AITA for telling my brother's "boyfriend" that's he's a cowardly pos and not telling my brother that he stopped by ?

My (19M) baby brother Martin (15M) is an openly gay wrestler. He has a bf Drake (16M) who is still closeted. They were originally supposed to come out together last year , but while Martin did Drake chickened out. Now I get it we live in a not to big town in Mississippi ,his home life isn't the greatest or most progressive to put it mildly , and he wants to be a pro wrestler. Martin understood that too and he's never made any attempt to push Drake to come out even though I know he hates being a secret.

The main problem is that when they're teammates make homophobic remarks or jokes especially at Martin's expense after he came out Drake joins in. When they're teammates started distancing themselves from Martin ,Drake joined in. When people tried to bully Martin ;Drake joined in while also sneaking around with Martin hanging out at our house secretly dating the boy he acts like he can't be to friendly with around their teammates. Me and our brother Zack (17M) have wanted to do something about it ,but Martin begged us not too and to just let him deal with it. He'd usually just laugh it off or make light of it even though we could tell it hurt him alot.

Last Friday Martin came home way more upset then I'd ever seen him ,crying and upset. He wouldn't talk to me or our parents and just stayed in his room all weekend. Zack told us what happened ,that apparently Martin' and Drake's teammates were pestering Drake about how he used to be so close to the gay kid. Drake decided to tell them that they stopped being friends when he found out the "f@@g@t" had a crush on him and tried to hit on him. He also started revealing a bunch of embarrassing secrets about Martin like how he wet the bed till he was 12. That obviously got back around to Martin and the shit storm ensued.

Drake tried to stop by Monday to apologize and got me at the door. Martin was upstairs in his room so I know he couldn't hear me and I just got so pissed that I snapped at Drake. I told Drake that he was a cowardly pos. That he didn't have to come out ,but he didn't get to treat my brother like shit and if thats the way he'd act that he should just leave my brother alone. I told him to never come over or try to talk to Martin again. He looked really sad ,just said he was sorry and left. Martin was upset all week because he hadn't heard anything from Drake. Martin apparently went over to Drake's house Friday and found out what I said. He came home upset about what I did and that I had no right. I countered that Drake treats him like shit and that he shouldn't have to deal with that. He yelled at me that I don't really know how bad Drake has I at home and I shoulda just butted out. AITA?